高性能纤维钢筋混凝土（UHPFRC）优越的抗爆性能已为大量试验所证实。但UHPFRC构件的爆炸破坏模式、关键参数的影响规律以及极限承载力量化标准还有待深入研究。鉴于UHPFRC材料和爆炸荷载特性均有较大的变异性，有必要考察这些变量对UHPFRC构件抗爆性能的影响程度。为此，项目在研究团队已开展的大量UHPFRC材料试验和静力试验及野外爆炸试验的基础上，拟基于随机有限元理论，来模拟爆炸荷载作用下构件的损伤破坏过程。首先，发展高效精确的单元模型和考虑应变率效应的UHPFRC本构模型，通过同试验数据对比验证模型的有效性。进而针对构件材料和爆炸荷载的不确定性，结合蒙特卡洛、有限元精细化模型建立随机有限元动力模型来模拟超高性能钢筋混凝土构件抵抗爆炸冲击的过程。项目研究可为超高性能钢筋混凝土构件的抗爆评估提供定量分析方法，对于UHPFRC构件抗爆设计提出有益参考，故具有重要的科学意义和工程应用价值。

A large number of experiments have proved that the ultra high performance fiber reinforced concrete (UHPFRC) has good priority under explosive blast. While there is a need to further study the failure mode, the effect of key parameters and the ultimate capacity of the UHPFRC. Due the high variation in UHPFRC properties and blast load factors, it is necessary to research the effect by these variations on UHPFRC. Hence, based on the completed UHPFRC material test, bending test and blast test by our research group, the project intends to model the failure mode of UHPFRC under blast using stochastic FEA. Firstly, develop an accurate unit model and the constitutive model of UHPFRC. The model can be valid by the experimental data. Then the project makes use of Monte Carlo simulation and stochastic fine model to reproduce the UHPFRC under explosive blast. This project can provide a quantitative method for assessing the UHPFRC properties subject to blast. Therefore, the research has scientific meaning and its results can be widely used in engineering.